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- Makhubela, B. C. E.University of Cape Town (author)
Hydroformylation of 1-octene using low-generation Rh(I) metallodendritic catalysts based on a tris-2-(2-pyridyliminoethyl)amine scaffold
- Article/chapterEnglish2012
Publisher, publication year, extent ...
- Royal Society of Chemistry (RSC),2012
Numbers
- LIBRIS-ID:oai:research.chalmers.se:2844b22b-b01d-47dc-a56a-c61f229c5ab7
- https://research.chalmers.se/publication/163663URI
- https://doi.org/10.1039/c2dt30856hDOI
Supplementary language notes
- Language:English
- Summary in:English
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Notes
- The synthesis and characterization of low-generation pyridylimine Rh(I) metallodendrimers is described. These metallodendrimers were obtained via a Schiff base condensation of tris-2-(aminoethyl) amine with 2-pyridinecarboxaldehyde to afford the tris-2-(2-pyridylimine ethyl) amine ligand (1). Subsequent complexation reactions with [RhCl(CO)(2)](2) and [RhCl(COD)](2) yielded the corresponding metal-containing dendrimers containing RhCl(CO) and Rh(COD) moieties on the periphery. These new rhodium metallodendrimers (2 and 3) and their precursor ligand (1) are thermally stable and have been characterized using H-1 NMR, C-13 NMR, P-31 NMR, FT-IR spectroscopy, elemental analysis as well as mass spectrometry. The Rh(I) metallodendrimers are highly active and chemo- and regioselective in the hydroformylation of 1-octene. Aldehydes were favoured at moderate to high temperatures (95 degrees C and 75 degrees C) and pressure (30 bars), while more iso-octenes were formed at low temperature (55 degrees C) and pressures (5 and 10 bars). The mononuclear analogues (5 and 6) also produced more aldehydes (albeit showing catalyst decomposition at 95 degrees C and 75 degrees C, 30 bars) and these aldehydes were mostly branched.
Subject headings and genre
- NATURVETENSKAP Kemi hsv//swe
- NATURAL SCIENCES Chemical Sciences hsv//eng
- homogeneous catalysis
- complexes
- rhodium(i)
- aqueous biphasic catalysis
- metallopolymers
- building-blocks
- dendrimers
- ligands
- silica
- oligomerization
Added entries (persons, corporate bodies, meetings, titles ...)
- Jardine, A. M.University of Cape Town (author)
- Westman, Gunnar,1964Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)westman (author)
- Smith, G. S.University of Cape Town (author)
- University of Cape TownChalmers tekniska högskola (creator_code:org_t)
Related titles
- In:Dalton Transactions: Royal Society of Chemistry (RSC)41:35, s. 10715-107231477-92261477-9234
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